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6
PROFIBUS communication
6.3
Communication
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Lenze · I/O system 1000 · Reference Manual · DMS 5.0 EN · 09/2016 · TD17
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6.3.3.1
Services for the acyclic parameter data transfer
Data transfer between DPM 1 and slaves
The connection is established by DPM 1 via the MS1 channel. The connection to the slave can only
be established by the master that has parameterised and configured the slave.
Data transfer between DPM 2 and slaves
The connection is established by DPM 2 via the MS1 channel using the "Initiate" service. One slave
can maintain several active connections at the same time. The number of connections is limited
depending on the resources available in the slave.
Service
Description
Read
The master reads a data block from the slave.
Write
The master writes a data block to the slave.
Alarm
The slave transmits an alarm message to the master. The master acknowledges
receipt. To prevent alarm messages from being overwritten, the slave can only
transmit a new alarm message if it has received the acknowledgement.
Alarm_Acknowledge
The master transmits an acknowledgement to the slave, confirming that it has
received an alarm message.
Status
The slave transmits a status message to the master. The master does not
acknowledge receipt.
Service
Description
Initiate / Abort
Establishing or terminating a connection for the acyclic data transfer between
DPM 2 and a slave.
Read
The master reads a data block from the slave.
Write
The master writes a data block to the slave.
Data_Transport
The master writes user-specific data (defined in profiles) to the slave and, if required,
it reads data from the slave in the same cycle.
Note!
For further information on the services and communication with DP-V0 and DP-V1, refer
to standard IEC 61158.